Sommer cable sc onyx 2025 mkii sc onyx 2008 patch cable sommer cable 320 0101 the sommer cable 320 0101 is a sc onyx 2025 mkii twin patch cable that is similar in construction and quality to the tricone mkii but a little thinner due to the twin construction it is suitable for the fabrication of hi fi cables adaptors and for permanent installation and it fits almost all jack and rca plugsthe sc onyx can be easily split at the centre of the cable each of the red and white wires has its